Abstract
The change in the amorphous structure of bulk Pd40Ni40P20 glass during structural relaxation was examined by an anomalous X-ray scattering (AXS) experiment with energies near the Ni K-absorption edge. It was confirmed by differential scanning calorimetry that the sample reached a meta-stable state (a fully relaxed state) with an equilibrium free volume concentration after annealing for about 1 × 104 s at 563 K and 4 × 104 s at 557 K just below the glass transition temperature Tg = 567 K. The structural changes on the progression toward a fully relaxed state were examined in samples annealed for 1 × 103 and 2 × 104 s at 563 K (glass A), and for 3.2 × 103, 1 × 104 and 7 × 104 s at 557 K (glass B). The structural analysis revealed that the coordination number of Ni-Ni like atom pairs increased with annealing time and that of Ni-Pd, unlike atom pairs, decreased. Meanwhile, the coordination number NPNi of P-Ni atom pairs and the nearest neighbor distance rPNi did not show a remarkable variation. However, prolonged annealing of 7 × 104 s at 557 K induced a remarkable change in NPNi and rPNi.
Original language | English |
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Pages (from-to) | 3053-3056 |
Number of pages | 4 |
Journal | Journal of Non-Crystalline Solids |
Volume | 353 |
Issue number | 32-40 |
DOIs | |
Publication status | Published - 2007 Oct 15 |
Keywords
- Amorphous metals
- Crystallization
- Metallic glasses
- Structure
- X-rays
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry